How to Display Data- P10:The best method to convey a message from a piece of research in health is via a fi gure. The best advice that a statistician can give a researcher is to fi rst plot the data. Despite this, conventional statistics textbooks give only brief details on how to draw fi gures and display data. | Displaying quantitative data 37 Figure Continued. obvious there are more women than men and the peak for men occurs at a greater heightthanfor women about compared to . The bins or intervals on the horizontal X-axis of the histogram can be labelled in variety of maybe labelledby usingthe midpoint of the eorreeoundingbe-havaa asdy haveng alab slat tTiaeurt orend of the ititervalas in . Foel-isiugirms wr recommeny dsoa on label the horvonfbl awsr abehe sSanS grend o VretSi ibtevval iincf withehi-method it iira-eer towork outthewiathol lhrivteaval as . Some intermediate mSearal tabels aan da omitted ate rariT tluttssiug up ide scale withobiuny uoiicesOtyioisof riariSy eries . A useful Seuroreor ahirtogr em e ihatir raw oaaibia n aisestthads rObe -tional formoSsheaeta m paaticelar wVflhgrthe rata are Normally digilsbateO nr aer tOrwfg. Tlir FV rgiri srtsT tsri e somvtimes known as the GauheiandieefsOuiion rs ose ofire tun UamatlSal drtF ltu-tions of stari ii and the h Soer m tfN eamally ai-tri0ute0d etawih Sirue a classic bell eTapi with anruk inSriemidaSeanasymmetricaltails sucls as that for beirat for women io . sr-ewet reta ree iuta wircT aer not symme l ty l n o m rlysreb edclaat haura a N et lowe italuve ueaa 38 How to Display Data Figure Separate histograms for the heights of men and women 3 a for men n 77 and b for women n 1 47. Displaying quantitative data 39 Baseline ulcer area cm2 Figure Positively skewed data - histogram of baseline ulcer area cm2 from leg ulcer trial n 21 7 long tail of higher values Figure while conversely negatively skewed data have a long left-hand tail at lower values with a peak at higher values see Figure . Histograms are similar to bar charts in that the variable of interest is displayed on the hr rirnntalsars fX-aris andthe treqrienciesareditplayedon the verticalrnñi T-teds . However bar charts are used for discontinuous data where